CN204030588U

CN204030588U - The automatic locking-controller of back-pressure

Info

Publication number: CN204030588U
Application number: CN201420400496.7U
Authority: CN
Inventors: 尤田柱
Original assignee: Individual
Current assignee: State Grid Corp of China SGCC; State Grid Jilin Electric Power Corp
Priority date: 2014-07-18
Filing date: 2014-07-18
Publication date: 2014-12-17
Anticipated expiration: 2024-07-18

Abstract

The automatic locking-controller of back-pressure, relates to the anti-power transmission prevention and control of low pressure field, has solved prior art shortcoming and the person accident problem of getting an electric shock and dying usually occurs.Reverse voltage blocking mechanism wherein comprises three voltage determination relays, three reverse voltage warning lamps, low tension switch is implemented to three mensuration relay normally-closed contacts of combined floodgate and lock-in control, low tension switch is implemented to three mensuration relay normally open contacts of separating brake and lock-in control; The open blocking mechanism of time delay wherein comprises time-delay relay, be connected in parallel on the monitoring voltage lamp at time-delay relay two ends, with the time-delay relay normally-closed contact of three mensuration relay normally open contacts acting in conjunction to low tension switch enforcement separating brake lock-in control, with the acting in conjunction of three mensuration relay normally-closed contacts, low tension switch is implemented the time-delay relay normally opened contact of closing locking control.The utility model for monitoring power supply distribution side to, prevent that the reverse power transmission of user side from causing upkeep operation personnel that personal electric shock casualty accident occurs to high-tension distributing line.

Description

The automatic locking-controller of back-pressure

Technical field

The utility model relates to the anti-power transmission of low pressure and monitors the automatic prevention and control technical field of locking, be specifically related to the automatic locking-controller of a kind of back-pressure, for electric power system distribution transformer low-pressure side (comprising user side), low-voltage customer is passed through to low-voltage distributing line, distribution transformer, to distribution transformer and the reverse power transmission prevention and control of high-tension distributing line.

Background technology

The normal electricity consumption of power consumer comes from the high-tension distributing line of electric power system, in the time of high-tension distributing line interruption maintenance, to enable and power autonomously provide power supply for power consumption equipment the urgent user of power requirement, this will likely make, and low-tension supply is counter to be delivered on high-tension distributing line, the operating personnel of high-tension distributing line and distribution transformer maintenance is formed to personal safety and threaten.For preventing that low tension loop is to the reverse power transmission of high-tension line, current technical safety measures mainly by " Electrical Safety agreement " and " electrical installation technical safety measures " means respectively to power consumer and the maintainer security system constraints of being got an electric shock.

The system constraints clause that it carries out user mainly comprises the contents such as " anti-grid-connected operational procedure is carried out in establishment ", " installing power supply single-throw diverter switch additional ", be specially: to power supply department application and report and submit main electrical scheme drawing, after power supply department is approved after examination, can construct; After construction and installation finish, must, through power supply department acceptance(check), sign security protocol postscript, can put into operation; Have the client of house generator, must set up house generator and use management system, execute-in-place code is thrown, cut to house generator; House generator client is installed, and generator power supply line and electric network source must be installed qualified double-throw switch with being connected of power consumption equipment, switch and drop into, and bonding power work, to the anti-power transmission of electrical network; The switching of house generator, must operate through professional and technical personnel, forbids privately to change operational mode, private and draws disorderly and connect and turn power supply to other client; Forbid user privately to change the electric connecting mode of using electricity system; In the time that client does not need house generator, required power supply department is removed after handling logout procedure; The user of power supply enterprise to installing house generator, set up " house generator registration record ", specifies special messenger monthly once to check, and fills in inspection evaluation result.

Its system constraints to upkeep operation personnel are by taking job safety technical measures, that is: before operation, work director will check operating environment, prevents the possibility of all anti-power transmissions; In operation location, after the true no-voltage of electrical verification, hang immediately sealing ground wire.

To power consumer, anti-power transmission prevention and control play a role in above measure.But although this means are initiatively from management, and actual counnter attack power transmission electric shock measure is passive really, is embodied in: if user does not have problem etc. in strict accordance with code operation or user side power transfer device, just may cause grid-connected in violation of rules and regulations; In addition, the situation management of power use department of the small-sized auxiliary power supply equipment privately using for domestic consumer is difficult to control, potential anti-power transmission hidden danger is difficult to investigation, this class user is not subject to " user security agreement " constraint, and use mastery of knowledge also not necessarily professional to auxiliary power supply equipment, likely cause with electrical network and be connected, to the reverse power transmission of high-tension distributing line.Make a general survey of the event that causes the person to get an electric shock and die by low-voltage customer to the anti-power transmission of high-tension distributing line in system not rare, and still do not have at present good technological means to carry out the initiatively reverse power transmission of prevention and control low pressure, even if distribution upkeep operation strict implement " power failure, electrical verification, ground connection " technical measures program, and because executive program needs the regular hour, if anti-power transmission appears in program process, still keep away the generation of unavoidable electric shock accidents.In addition, the habitual violation phenomenon of imperfect earth or ignorance ground protection has all formed the factor of anti-power transmission electric shock accidents.Therefore, anti-low pressure is extremely important to the prevention and control of the anti-power transmission technology of high-tension distributing line, need to realize technically the control of the anti-power transmission automatic blocking of low-voltage customer.

Utility model content

In order to solve the passive of the shortcoming of existing anti-power transmission technology and management and the person accident problem of getting an electric shock and dying usually occurs, the utility model provides a kind of back-pressure automatic locking-controller.

The utility model for the technical scheme that technical solution problem adopts as follows:

The automatic locking-controller of back-pressure of the present utility model, realizes the anti-voltage security control that send of low pressure for coordinating with low tension switch, comprises the open blocking mechanism of reverse voltage blocking mechanism and time delay:

Described reverse voltage blocking mechanism comprises:

Three phase-splitting voltage determination relays that common port is parallel with one another, its common terminal be connected to zero mutually in, another terminals are connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after the control of three low tension switch main contactss, measure reverse voltage for low tension switch three phase-splitting voltage determination relays under gate-dividing state;

Be connected in parallel on respectively three phase-splitting reverse voltage warning lamps at three phase-splitting voltage determination relay two ends, for the voltage of measuring is warned with light form;

After series connection, be connected to successively three mensuration relay normally-closed contacts in low tension switch closing coil loop, be used to form combined floodgate lock control output signal low tension switch is implemented to close a floodgate and lock-in control;

Measure relay normally open contact for three that after parallel with one another, are connected to low tension switch switching winding loop, be used to form separating brake lock control output signal low tension switch is implemented to separating brake and lock-in control;

The open blocking mechanism of described time delay comprises:

Two terminals are directly connected to respectively the monitoring voltage time-delay relay in the one phase voltage loop neutralization zero mutually of distribution transformer side, for monitoring forward voltage and open locking in short-term;

Be connected in parallel on the monitoring voltage lamp at monitoring voltage time-delay relay two ends, described monitoring voltage lamp is followed monitoring voltage time-delay relay excitation and is ignited;

With the acting in conjunction of three mensuration relay normally-closed contacts, low tension switch closing coil loop is implemented the time-delay relay normally opened contact of closing locking control, for forward power transmission automatic closing;

With the time-delay relay normally-closed contact of three mensuration relay normally open contacts acting in conjunction to low tension switch switching winding loop enforcement separating brake lock-in control, for former low tension switch in "on" position examination separating brake in the time of power transmission once, so as three phase-splitting voltage determination relay qualification voltage distribution sides to.

The opening of the described time-delay relay normally-closed contact delay time of adjusting meets: during by load user's side reverse power transmission, after the former low tension switch automatic brake separating in "on" position, reliable locking is not closed a floodgate; During by distribution transformer forward power transmission, the former low tension switch in "on" position automatically tries separating brake and is once accredited as after forward power transmission the formal reliable power transmission of automatic closing again;

Described time-delay relay normally opened contact and the opening of the time-delay relay normally-closed contact delay time of adjusting is identical, that is: described time-delay relay normally opened contact and time-delay relay normally-closed contact move simultaneously.

Described three phase-splitting voltage determination relays, monitoring voltage time-delay relay, separating brake relation operate time of low tension switch meets work-based logic needs: monitoring voltage time-delay relay operate time, the open delay time of adjusting was greater than phase-splitting voltage determination relay actuation time+low tension switch opening time sum, and leave appropriate time nargin, described monitoring voltage time-delay relay operate time, the open delay time of adjusting can be adjusted arbitrarily according to actual needs.

In the time that low tension switch is A.C. contactor, the terminals of described three phase-splitting voltage determination relays are connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after the control of three A.C. contactor main contactss, be used for measuring reverse voltage, the common terminal of three phase-splitting voltage determination relays be connected to zero mutually in, two terminals of monitoring voltage time-delay relay are directly connected to respectively in the one phase voltage loop neutralization zero mutually of distribution transformer side, obtain the electric rear monitoring voltage lamp in parallel with monitoring voltage time-delay relay and ignite, for monitoring forward voltage, A.C. contactor closing coil one end is directly connected in distribution transformer side one phase voltage loop, the other end after three mensuration relay normally-closed contacts and the control of time-delay relay normally opened contact, be connected to zero mutually in, between three mensuration relay normally-closed contacts and time-delay relay normally opened contact for being connected in series, three mensuration relay normally-closed contacts are connected successively, no matter to ensure user anti-power transmission device and in which locking-controller mutually of the present utility model can work, loop after three mensuration relay normally-closed contacts and the series connection of time-delay relay normally opened contact and A.C. contactor are often opened auxiliary contact and are in parallel, A.C. contactor often leaves auxiliary contact for the self-sustaining of closing a floodgate, time-delay relay normally opened contact closure after delay time is adjusted in the opening of monitoring voltage time-delay relay, three mensuration relay normally-closed contacts and time-delay relay normally opened contact and A.C. contactor are often opened acting in conjunction between auxiliary contact provides A.C. contactor closing coil feed motion exciting voltage and self-contained supply, three A.C. contactor main contacts two ends are connected to respectively in the load user side voltage circuit of distribution transformer side and low-voltage distributing line, and after A.C. contactor closing coil excitation, its three A.C. contactor main contacts closures will provide three phase mains for user.

This locking-controller coordinates with A.C. contactor to be realized the anti-voltage security control that send of low pressure, when by distribution transformer side forward power transmission: under this situation, in the time of incoming call, three phase-splitting voltage determination relays of reverse voltage blocking mechanism had not all obtained exciting voltage, three mensuration relay normally-closed contacts are in closed on-position, time-delay relay normally opened contact is closed (if time-delay relay normally opened contact does not access loop after open setting time, be equivalent to contact by short circuit), A.C. contactor closing coil obtains exciting voltage and carries out feed motion, all closed connections to load user side forward power transmission of three A.C. contactor main contactss, A.C. contactor often leaves the auxiliary closing of contact and connects formation self-sustaining, A.C. contactor is able to move in "on" position, A.C. contactor often leaves main contacts and connects rear three phase-splitting voltage determination relays and obtain electric in excited state, the phase-splitting reverse voltage warning lamp that is connected in parallel on three voltage determination relay two ends keeps igniting, now warning lamp uses as load operation repeater lamp.

When by the reverse power transmission of load user's side: under this situation, in the load user side phase of low-voltage distributing line or each phase voltage loop, having anti-power transmission presses, in three phase-splitting voltage determination relays, have at least an acquisition exciting voltage to start action, in three mensuration relay normally-closed contacts, have at least one will disconnect, A.C. contactor closing coil can not obtain exciting voltage, and be connected in parallel on and obtain the phase-splitting reverse voltage warning lamp at phase-splitting voltage determination relay two ends that exciting voltage starts action and ignite, press alarm for anti-power transmission.

Locking-controller of the present utility model coordinates with A.C. contactor to be realized the anti-voltage security control that send of low pressure, described monitoring voltage time-delay relay is mainly used in the monitoring voltage of distribution transformer side, the element of reflecting voltage state is monitoring voltage lamp, also can participate in A.C. contactor closing coil closing locking, or do not participate in the closing locking of A.C. contactor closing coil, if do not participate in, time-delay relay normally opened contact does not access use; No matter whether incoming transport contactor closing coil loop of time-delay relay normally opened contact, the opening of the monitoring voltage time-delay relay delay time of adjusting does not need to do fiting tuning, can adjust arbitrarily.

In the time that low tension switch is intelligent breaker, the terminals of three phase-splitting voltage determination relays are connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after the control of three intelligent breaker main contactss, for measuring reverse voltage under intelligent breaker main contacts off-state, the common terminal of three phase-splitting voltage determination relays be connected to zero mutually in, time-delay relay normally-closed contact often leaves auxiliary contact with intelligent breaker again after being connected in series with three mensuration relay normally open contacts parallel with one another and connects, the controlled end of access intelligent breaker switching winding, intelligent breaker switching winding controlled end is often opened auxiliary contact through intelligent breaker, three parallel with one another are accessed intelligent breaker working power loop after measuring relay normally open contact and the control of time-delay relay normally-closed contact, time-delay relay normally-closed contact and three parallel with one another measure relay normally open contact and intelligent breaker is often opened between auxiliary contact as being connected in series, time-delay relay normally-closed contact is open in short-term for locking-controller blocking function of the present utility model, opening into intelligent breaker execution once tries to proceed to forward combined floodgate or reverse blocking state after separating brake, two terminals of monitoring voltage time-delay relay are directly connected to respectively in the one phase voltage loop neutralization zero mutually of distribution transformer side, obtain the electric rear monitoring voltage lamp in parallel with monitoring voltage time-delay relay and ignite, for monitoring forward voltage, three mensuration relay normally-closed contacts of series connection are connected in series with the normally closed auxiliary contact of intelligent breaker after connecting with time-delay relay normally opened contact more successively, the controlled end of access intelligent breaker closing coil, be that intelligent breaker closing coil controlled end is through the normally closed auxiliary contact of intelligent breaker, after three mensuration relay normally-closed contacts of series connection and the control of time-delay relay normally opened contact, access intelligent breaker working power loop successively, the normally closed auxiliary contact of intelligent breaker, between three mensuration relay normally-closed contacts and time-delay relay normally opened contact for being connected in series, when time-delay relay normally opened contact is used for forward power transmission, the combined floodgate of intelligent breaker starts, that is: the former intelligent breaker automatic closing power transmission in gate-dividing state when voltage comes from distribution transformer side, or former intelligent breaker in "on" position examination separating brake once after formal combined floodgate power transmission, ensure user anti-power transmission device no matter and in which locking-controller mutually of the present utility model can work, the normally closed auxiliary contact of intelligent breaker is for determining whether intelligent breaker is gate-dividing state, three intelligent breaker main contacts two ends are connected to respectively in the load user side voltage circuit of distribution transformer side and low-voltage distributing line, intelligent breaker closing coil excitation rear three the intelligent breaker main contacts closures of closing a floodgate will provide three phase mains for user, when voltage comes from low-voltage customer load side, the direct locking of the former intelligent breaker in gate-dividing state is closed a floodgate, or former intelligent breaker in "on" position proceeds to closing locking state after examination separating brake, the phase-splitting reverse voltage warning lamp that is connected in parallel on three phase-splitting voltage determination relay two ends keeps igniting, now phase-splitting reverse voltage warning lamp uses as load operation repeater lamp.

Locking-controller of the present utility model coordinates with intelligent breaker to be realized to the anti-voltage security control that send of low pressure, when by distribution transformer side forward power transmission:

Under this situation, in the time of incoming call, three phase-splitting voltage determination relays of reverse voltage blocking mechanism had not all obtained exciting voltage, three mensuration relay normally-closed contacts are all in closed on-position, after the open delay time of adjusting, time-delay relay normally opened contact is closed connects, intelligent breaker closing coil obtains exciting voltage and carries out feed motion, all closed connections to load user side forward power transmission of three intelligent breaker main contactss, and intelligent breaker remains on "on" position operation, if intelligent breaker is former in "on" position when power transmission, three mensuration relay normally open contacts parallel with one another while incoming call are all by closure, and in the open delay time of adjusting time-delay relay normally-closed contact temporarily in closed on-position, intelligent breaker switching winding obtains exciting voltage and carries out separating brake, after separating brake because three mensuration relay normally-closed contacts all will return to closure, after the open delay time of adjusting, time-delay relay normally opened contact is closed connects, intelligent breaker closing coil obtains exciting voltage and carries out formal combined floodgate power transmission, thereafter, because the time exceedes the setting value of opening the time delay of adjusting already, although three are measured relay normally open contact by closure, but because time-delay relay normally-closed contact is opened, intelligent breaker switching winding can not obtain exciting voltage, intelligent breaker moves in "on" position.

When by the reverse power transmission of load user's side: under this situation, in the time of incoming call, three phase-splitting voltage determination relays of reverse voltage blocking mechanism have at least one to obtain exciting voltage, three mensuration relay normally-closed contacts of series connection have at least one to open successively, and intelligent breaker closing coil can not obtain exciting voltage and in blocking, if intelligent breaker is former in "on" position when power transmission, three mensuration relay normally open contacts parallel with one another while incoming call have a closure at least, in the open delay time of adjusting, time-delay relay normally-closed contact is in temporary transient closure state, intelligent breaker switching winding obtains exciting voltage and carries out separating brake action, after separating brake, press and still exist because of anti-power transmission, three mensuration relay normally-closed contacts have one at least in open mode, intelligent breaker closing coil can not obtain exciting voltage and just enter closing locking state, and be attended by phase-splitting reverse voltage warning lamp and ignite and warned.

When locking-controller of the present utility model coordinates with intelligent breaker, described monitoring voltage time-delay relay is used for monitoring that distribution transformer side voltage is only miscellaneous function, its major function is that the time-delay relay normally-closed contact opened by short time delay makes the former intelligent breaker in "on" position implement once to try separating brake, with identify voltage distribution side to; It implements the locking effect of reverse power transmission, can realize opening is in short-term to come from time-delay relay normally-closed contact to have short time delay opening characteristic, and the size of its short time delay opening time (open adjust delay time) need be carried out logic with intelligent breaker operate time, phase-splitting voltage determination and coordinate relay actuation time; Monitoring voltage time-delay relay, meet work-based logic needs the operate time of three phase-splitting voltage determination relays and intelligent breaker, the opening of the monitoring voltage time-delay relay delay time of adjusting is greater than operate time+intelligent breaker switching winding opening time sum of measuring one of relay normally open contact, and leaves time margin.

Locking-controller of the present utility model can be realized by relay, also can be realized by the form such as integrated circuit, microprocessor chip.While wherein realization by relay type, can be discrete relay group, can be also banked relay; Appropriate to the occasionly do built-in design at intelligent breaker protection control loop when being realized by the form such as integrated circuit, microprocessor chip.No matter which kind of pattern, reverse voltage locking and the open philosophy function logic of this locking-controller are constant.

The beneficial effects of the utility model are: the automatic locking-controller of back-pressure of the present utility model can electric power system distribution transformer low-pressure side (comprising user side) directly install and use or for high-tension distributing line by the voltage transformer use of powering, for monitoring power supply distribution side to, prevent that the reverse power transmission of user side from causing upkeep operation personnel that personal electric shock casualty accident occurs to high-tension distributing line and distribution transformer.When by transformer station's normal power supply, the low tension switch of locking-controller control is automatic closing power transmission normally; When by the reverse power transmission of user's low pressure, the reverse power transmission of locking is closed a floodgate, and gives signal warning.The anti-voltage determination latching logic that send of this locking-controller can do built-in design in intelligent breaker; as defencive function expanded application; its electrical wiring, by be attributed to the inside principle wiring of intelligent breaker simultaneously, can be relay type, integrated circuit pattern or micro-chip processor pattern in the built-in design of intelligent breaker.Or with A.C. contactor assembly, adopt relay type realize reverse power transmission locking by electrical wiring.Relay type can be discrete relay element, or the banked relay such as electronic circuit, integrated circuit.

Locking-controller of the present utility model is except being directly used in low-voltage distributing line, also can be for high-tension distributing line as anti-power transmission lock-in control, when for high-tension distributing line, voltage relay is measured in three phase-splittings, and the operating voltage of monitoring voltage time-delay relay is powered by the voltage transformer of both sides, high-tension distributing line control point.

Brief description of the drawings

Fig. 1 is the automatic locking-controller logical constitution of back-pressure of the present utility model schematic block diagram.

Fig. 2 is the relay type assembling principle sketch of the automatic locking-controller of back-pressure of the present utility model.

Fig. 3 is the electrical principle expanded view that the automatic locking-controller of back-pressure of the present utility model coordinates with A.C. contactor.

Fig. 4 is the electrical principle expanded view that the automatic locking-controller of back-pressure of the present utility model coordinates with intelligent breaker.

Fig. 5 is the application annexation figure that the automatic locking-controller of back-pressure of the present utility model coordinates with A.C. contactor.

Fig. 6 is that the automatic locking-controller of back-pressure of the present utility model mixes application schematic diagram.

In figure, 1, reverse voltage blocking mechanism, 10, phase-splitting reverse voltage warning lamp, 11～13, phase-splitting voltage determination relay, 14～16, measure relay normally-closed contact, 17～19, measure relay normally open contact, 2, the open blocking mechanism of time delay, 20, monitoring voltage lamp, 21, monitoring voltage time-delay relay, 22, time-delay relay normally-closed contact, 23, time-delay relay normally opened contact, 3, A.C. contactor, 31, A.C. contactor closing coil, 32, A.C. contactor main contacts, 33, auxiliary contact often left by A.C. contactor, 4, intelligent breaker, 41, intelligent breaker closing coil, 42, intelligent breaker switching winding, 43, intelligent breaker main contacts, 44, intelligent breaker is often opened auxiliary contact, 45, the normally closed auxiliary contact of intelligent breaker, the terminals of locking-controller relay type of the present utility model, its specific definition or quantity are not limited to this, only for narration is clear.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1 and Figure 2, the automatic locking-controller of back-pressure of the present utility model is made up of reverse voltage blocking mechanism 1 and 2 two functional logic blocks of the open blocking mechanism of time delay, reverse voltage blocking mechanism 1 is mainly by three phase-splitting reverse voltage warning lamps 10, three phase-splitting voltage determination relays 11,12,13, three 14,15,16, three of mensuration relay normally-closed contacts are measured relay normally open contact 17,18,19 compositions.Three phase-splitting voltage determination relay 11,12,13 common ports are parallel with one another, its common terminal be 8. connected to zero mutually in, another terminals of phase-splitting voltage determination relay 11 2., 6. 4. another terminals of phase-splitting voltage determination relay 12 be connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after the control of three low tension switch main contactss, for measuring single-phase and three-phase reverse voltage with another terminals of phase-splitting voltage determination relay 13; Three phase-splitting reverse voltage warning lamps 10 are connected in parallel on respectively three phase-splitting voltage determination relay 11,12,13 two ends, warned with light form for the reverse voltage that low tension switch gate-dividing state is measured, one or more while being measured to reverse voltage when having in three phase-splitting voltage determination relays 11,12,13, its corresponding phase-splitting reverse voltage warning lamp 10 ignites warning; Connect with time-delay relay normally-closed contact 22 again after measuring relay normally open contact 17,18,19 connections parallel with one another for three, its two ends be terminals 9. and terminals be connected to low tension switch switching winding loop and implement separating brake and lock-in control; Three mensuration relay normally-closed contacts 14,15,16 are connected successively, its two ends be terminals 1. with terminals 3., time-delay relay normally opened contact 23 two ends be terminals 5. with terminals 7., three mensuration relay normally-closed contacts 14,15,16 of series connection and time-delay relay normally opened contact 23 are connected to low tension switch closing coil loop and implement combined floodgate and lock-in control (illustrating: in the time that low tension switch is A.C. contactor, time-delay relay normally opened contact 23 can not access this loop) after being connected in series successively; Three mensuration relay normally-closed contacts 14,15,16, measure relay normally open contact 17,18,19 for three, time-delay relay normally-closed contact 22 is associated with low tension switch coil with time-delay relay normally opened contact 23, and contact capacity and insulation voltage meet low tension switch wire loop need of work; Three mensuration relay normally-closed contacts 14,15,16 and time-delay relay normally opened contact 23 form combined floodgate lock control output signal low tension switch are implemented to close a floodgate and lock-in control, measure relay normally open contact 17,18,19 and time-delay relay normally-closed contact 22 for three and form separating brake lock control output signal low tension switch is implemented to separating brake and lock-in control.

The open blocking mechanism 2 of time delay is mainly made up of monitoring voltage lamp 20, monitoring voltage time-delay relay 21, time-delay relay normally-closed contact 22, time-delay relay normally opened contact 23, monitoring voltage lamp 20 is connected in parallel on monitoring voltage time-delay relay 21 two ends, the terminals of monitoring voltage time-delay relay 21 directly be connected in distribution transformer side one phase voltage loop, another terminals of monitoring voltage time-delay relay 21 be 10. directly connected to zero mutually in, be used for monitoring forward voltage and for open locking in short-term, monitoring voltage lamp 20 is followed the excitation of monitoring voltage time-delay relay 21 and is ignited, time-delay relay normally-closed contact 22 and three the parallel with one another separating brake control locked loops of measuring the common composition low tension switches of relay normally open contacts 17,18,19, if low tension switch is A.C. contactor, 3 these separating brake lock-in control loops are " leaving unused "; The closing locking control loop of time-delay relay normally opened contact 23 and three common composition low tension switches of mensuration relay normally-closed contact 14,15,16, if time delay relay normally open contact 23 can not access when low tension switch is A.C. contactor 3.

Monitoring voltage time-delay relay 21 assembling capable of being combined or the discrete installation of the open blocking mechanism 2 of three phase-splitting voltage determination relays 11,12,13 of reverse voltage blocking mechanism 1 and time delay; it can be the patterns such as electromagnetic relay element, Static Electro sub-element, integrated circuit, microprocessor chip, integrated circuit or the design of the suitable intelligent breaker defencive function of microprocessor chip pattern expanding built-in.Three phase-splitting voltage determination relays 11, 12, the combination reflecting voltage of three phase-splitting reverse voltage warning lamps 10 in 13 loops and the monitoring voltage lamp 20 in monitoring voltage time-delay relay 21 loops is from direction and low tension switch running status, combination variety has: if low tension switch has electricity and the user's side of loading only has monitoring voltage lamp 20 bright during without electricity in open position state distribution transformer side, when if load user side has electricity, distribution transformer side is without electricity, monitoring voltage lamp 20 does not work and three phase-splitting reverse voltage warning lamps 10 corresponding with there being electricity are bright, if monitoring voltage lamp 20 is bright with three the phase-splitting reverse voltage warning lamps 10 corresponding with there being electricity when distribution transformer side has electricity with load user side, no matter low tension switch is that distribution transformer side has electricity or load user side has electricity in the time of co-bit, and monitoring voltage lamp 20 and three phase-splitting reverse voltage warning lamps 10 are all bright.

21 on-line operations of monitoring voltage time-delay relay are implemented monitoring in distribution transformer side voltage circuit and to system power supply voltage, the short time delay opening action of its time-delay relay normally-closed contact 22 meets: during by the reverse power transmission of load user's side, the automatically reliable locking of the former low tension switch in gate-dividing state is not closed a floodgate or made reliable locking after the former low tension switch automatic brake separating in "on" position; During by distribution transformer forward power transmission, the former low tension switch in gate-dividing state is automatically non-shut-brake after reliable combined floodgate or make the former low tension switch in "on" position automatically try separating brake to be once accredited as after forward power transmission formal automatic closing power transmission again.

Three phase-splitting voltage determination relays 11,12,13, monitoring voltage time-delay relay 21, relation operate time of low tension switch meets work-based logic needs, that is: the opening of monitoring voltage time-delay relay 21 delay time of adjusting is greater than " measuring operate time+low tension switch opening times of one of relay normally open contacts 17,18,19 for three " sum and leaves appropriate time nargin.

Be specially, the open delay time of adjusting of time-delay relay normally-closed contact 22 is greater than " measures relay normally open contact 17 for three, 18, operate time+intelligent breaker switching winding 42 opening times of one of 19 " sum consider appropriate time margin, time-delay relay normally opened contact 23 time of make delay is in short-term greater than " measures relay normally open contact 17 for three, 18, operate time+intelligent breaker switching winding 42 opening times of one of 19 " sum consider appropriate time margin, to ensure that low tension switch (referring to intelligent breaker 4) can reliably try separating brake when power transmission under "on" position, make locking-controller of the present utility model carry out voltage distribution side to qualification after examination separating brake, and time-delay relay normally-closed contact 22 sides open disconnection low tension switch sub-gate circuit after the nargin time, make it proceed to blocking, and the closed formal combined floodgate of connecting closing circuit enforcement forward power transmission of time-delay relay normally opened contact 23.

This time coordination logic is the operation principle feature based on locking-controller of the present utility model; taking low tension switch before forward power transmission in open position as prerequisite; must be in open position for A.C. contactor 3; make it in open position for intelligent breaker 4 by low pressure (decompression) protection; if intelligent breaker 4 low pressure (decompression) protection does not make for some reason intelligent breaker 4 separating brakes in the time having a power failure, locking-controller of the present utility model will be implemented the action of examination separating brake.Protection (low pressure, decompression, short circuit, the overcurrent etc.) action of intelligent breaker 4 needs the automatic closing of locking locking-controller of the present utility model to start loop.In reality, will adjust the concrete operate time of its monitoring voltage time-delay relay 21 according to low tension switch and phase-splitting voltage determination effective relay actuation time characteristic.

The automatic locking-controller of back-pressure of the present utility model coordinates with low tension switch to realize implements security control to the reverse power transmission of low pressure, and its low tension switch can be A.C. contactor 3 or intelligent breaker 4, is electrically connected accordingly according to low tension switch particular type.

Embodiment one, as shown in Figure 3 and Figure 5, in the time that low tension switch is A.C. contactor 3, A.C. contactor 3 mainly comprises: auxiliary contact 33 often left by A.C. contactor closing coil 31, three A.C. contactor main contactss 32, A.C. contactors.2., 4., 6. the terminals of three phase-splitting voltage determination relays 11,12,13 of locking-controller of the present utility model are connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after three A.C. contactor main contactss 32 are controlled, be used for measuring reverse voltage, the common terminal of three phase-splitting voltage determination relays 11,12,13 be 8. connected to zero mutually in, the terminals of monitoring voltage time-delay relay 21 directly be connected in distribution transformer side one phase voltage loop, another terminals of monitoring voltage time-delay relay 21 be 10. directly connected to zero mutually in, obtain electric after the monitoring voltage lamp 20 in parallel with monitoring voltage time-delay relay 21 ignite, for monitoring forward voltage, A.C. contactor closing coil 31 one end are directly connected in distribution transformer side one phase voltage loop, the other end is through three mensuration relay normally-closed contacts 14, 15, 16 and the time-delay relay normally opened contact 23 (connection of time-delay relay normally opened contact 23 in this loop nonessential, can cancel) control after be connected to zero mutually in, three mensuration relay normally-closed contacts 14 of series connection successively, 15, 16 and time-delay relay normally opened contact 23 between for being connected in series, ensure user anti-power transmission device no matter and in which locking-controller mutually of the present utility model can work, three mensuration relay normally-closed contacts 14, 15, 16 often to open auxiliary contact 33 in parallel with A.C. contactor again after connecting with time-delay relay normally opened contact 23, A.C. contactor closing coil 31 is implemented to closing locking control, after A.C. contactor closing coil 31 excitation feed motions, implement self-sustaining by the auxiliary contact 33 of often opening of A.C. contactor 3, three A.C. contactor main contacts 32 two ends are connected to respectively in the load user side voltage circuit of distribution transformer side and low-voltage distributing line, after A.C. contactor closing coil 31 excitations, its three A.C. contactor main contacts 32 closures will provide three phase mains for user.

The forward " automatic closing " of implementing after locking-controller of the present utility model coordinates with A.C. contactor 3, decompression " automatic brake separating ", the logic of reverse voltage " locking combined floodgate " will identify voltage and come from the load user side of distribution transformer side or low-voltage distributing line, in the time being accredited as voltage from distribution transformer side, will carry out forward " automatic closing ", to load user side power transmission, in the time being accredited as voltage from load user side, will carry out reverse voltage " locking combined floodgate ", stop sending high pressure and being warned to distribution transformer side is counter, A.C. contactor closing coil 31 decompressions " automatic brake separating " in the time that distribution transformer has a power failure, while being convenient to send a telegram here, differentiate voltage from direction, decompression " automatic brake separating " plays o-volt protection effect to the anti-power transmission device of user.Concrete judgement and execution point two kinds of situations:

The first situation, by distribution transformer side forward power transmission

Under this situation, in the time of incoming call, three phase-splitting voltage determination relays 11 of reverse voltage blocking mechanism 1, 12, 13 had not all obtained exciting voltage, three mensuration relay normally-closed contacts 14, 15, 16 in closed on-position, if time-delay relay normally opened contact 23 participates in closing a floodgate and controls, time-delay relay normally opened contact 23 closures after the open delay time of adjusting, A.C. contactor closing coil 31 obtains exciting voltage and carries out feed motion, all closed connections to load user side forward power transmission of three A.C. contactor main contactss 32, A.C. contactor often leaves closed connection the in auxiliary contact 33 and forms self-sustaining, A.C. contactor 3 is maintained the operation of closing a floodgate.

Second case, by the reverse power transmission of load user's side

Under this situation, in the load user side phase of low-voltage distributing line or each phase voltage loop, having anti-power transmission presses, in three phase-splitting voltage determination relays 11,12,13, have at least an acquisition exciting voltage to start action, in three mensuration relay normally-closed contacts 14,15,16, have at least one will disconnect, A.C. contactor closing coil 31 can not obtain exciting voltage, and be connected in parallel on and obtain the phase-splitting reverse voltage warning lamp 10 at phase-splitting voltage determination relay 11,12,13 two ends that exciting voltage starts action and ignite, press alarm for anti-power transmission.

When the automatic locking-controller of back-pressure of the present utility model coordinates with A.C. contactor 3, monitoring voltage time-delay relay 21 is mainly used in the monitoring voltage of distribution transformer side, the element of reflecting voltage state is monitoring voltage lamp 20, also can participate in the closing locking of A.C. contactor closing coil 31, control by participating in time-delay relay normally opened contact 23 incoming transport contactor closing coil 31 loops closing a floodgate, but its open delay time of adjusting does not need to do fiting tuning, just the combined floodgate of A.C. contactor 3 early will depend on the open delay time of adjusting with slow, the open delay time of adjusting can be adjusted as intrinsic minimum value.

When the automatic locking-controller of back-pressure of the present utility model coordinates with A.C. contactor 3, only adopt three mensuration relay normally-closed contacts 14,15,16 to control A.C. contactor closing coil 31 automatic closings and have electric self-sustaining, the loss of excitation work automatically of nothing electricity, be convenient in the each phase voltage of the load user side loop of 11,12,13 pairs of low-voltage distributing lines of three phase-splitting voltage determination relays voltage from the differentiation of direction, be judged to when it belongs to the reverse power transmission of load user's side and implement closing locking alarm, and do not need three to measure relay normally open contact 17,18,19.

The anti-voltage determination latching logic that send of embodiment two, locking-controller of the present utility model can do built-in design in intelligent breaker 4; as defencive function expanded application, its electrical wiring or logical relation will be attributed to inside principle wiring or the intelligent protection logic of intelligent breaker simultaneously.As shown in Figure 4, in the time that low tension switch is intelligent breaker 4, intelligent breaker 4 mainly comprises: intelligent breaker closing coil 41, intelligent breaker switching winding 42, three intelligent breaker main contactss 43, intelligent breaker is often opened auxiliary contact 44, the normally closed auxiliary contact 45 of intelligent breaker.The operating voltage of intelligent breaker 4 is gone back to routing element manufacturer and is determined, for directly perceived convenient with narration, simply illustrate with Fig. 4, do not embody manually dividing of intelligent breaker 4, the loops such as combined floodgate manipulation and intelligent protection: three phase-splitting voltage determination relays 11 of locking-controller of the present utility model, 12, 13 terminals 2., 4., 6. be connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after three intelligent breaker main contactss 43 are controlled, be used for measuring reverse voltage, three phase-splitting voltage determination relays 11, 12, 13 common terminal be 8. connected to zero mutually in, time-delay relay normally-closed contact 22 is connected in series with three voltage determination relay normally open contacts 17,18,19 parallel with one another, be connected in intelligent breaker switching winding 42 loops, time-delay relay normally-closed contact 22 is open in short-term for locking-controller blocking function of the present utility model, opens into intelligent breaker 4 and carries out and once try to proceed to blocking after separating brake, the terminals of monitoring voltage time-delay relay 21 directly be connected in distribution transformer side one phase voltage loop, another terminals of monitoring voltage time-delay relay 21 be 10. directly connected to zero mutually in, obtain electric after the monitoring voltage lamp 20 in parallel with monitoring voltage time-delay relay 21 ignite, for monitoring forward voltage, the controlled end of intelligent breaker closing coil 41 is through the normally closed auxiliary contact 45 of intelligent breaker, three mensuration relay normally-closed contacts 14 of series connection mutually, 15, 16 and time-delay relay normally opened contact 23 be connected in series in the electric power loop of rear access intelligent breaker 4, for voltage while coming from distribution transformer side former intelligent breaker 4 automatic closing power transmissions in gate-dividing state or former intelligent breaker 4 in "on" position examination separating brake once after formal combined floodgate power transmission, ensure user anti-power transmission device no matter and in which locking-controller mutually of the present utility model can work, the normally closed auxiliary contact 45 of intelligent breaker is for determining whether intelligent breaker 4 is gate-dividing state, the controlled end of intelligent breaker switching winding 42 is often opened auxiliary contact 44, three parallel with one another through intelligent breaker and is measured after relay normally open contact 17,18,19 and time-delay relay normally-closed contact 22 are controlled and access in the working power loop of intelligent breaker 4, three mensuration relay normally open contacts 17,18,19 parallel with one another are often opened auxiliary contact 44 with intelligent breaker again after connecting with time-delay relay normally-closed contact 22 and are connected, and once identify afterwards voltage direction for the former intelligent breaker 4 in "on" position at examination separating brake, three intelligent breaker main contacts 43 two ends are connected to respectively in the load user side voltage circuit of distribution transformer side and low-voltage distributing line, and intelligent breaker closing coil 41 excitations rear three intelligent breaker main contacts 43 closures of closing a floodgate will provide three phase mains for user.

The forward " automatic closing " of implementing after locking-controller of the present utility model coordinates with intelligent breaker 4, " examination separating brake once ", forward " formally closes a floodgate ", oppositely the logic of " locking combined floodgate " will identify voltage and come from the load user side of distribution transformer side or low-voltage distributing line, in the time being accredited as voltage from distribution transformer side, will carry out forward " automatic closing " to load user's side power transmission or examination point rear formal combined floodgate power transmission, in the time being accredited as voltage from load user side, will carrying out reverse " locking combined floodgate " or implement locking after automatically separating, stop sending high pressure and being warned to distribution transformer side is counter, concrete judgement and execution point two kinds of situations:

Under this situation, in the time of incoming call, three phase-splitting voltage determination relays 11,12,13 of reverse voltage blocking mechanism 1 had not all obtained exciting voltage, three mensuration relay normally-closed contacts 14,15,16 are all in closed on-position, after the open time delay of adjusting of time-delay relay normally opened contact 23, intelligent breaker closing coil 41 obtains exciting voltage and carries out feed motion, all closed connections to load user side forward power transmission of three intelligent breaker main contactss 43; Thereafter, although intelligent breaker 4 closes a floodgate, rear three phase-splitting voltage determination relays 11,12,13 obtain its three of exciting voltages and measure relay normally open contact 17,18,19 closures, but time-delay relay normally-closed contact 22 exceedes opening already to be adjusted delay time and opens, intelligent breaker switching winding 42 can not get exciting voltage, and intelligent breaker 4 maintains "on" position operation.

Second case, by the reverse power transmission of load user's side

Under this situation, in the load user side phase of low-voltage distributing line or each phase voltage loop, having anti-power transmission presses, in three phase-splitting voltage determination relays 11,12,13, have at least an acquisition exciting voltage to start action, in three mensuration relay normally-closed contacts 14,15,16, have at least one will disconnect, intelligent breaker closing coil 41 can not obtain exciting voltage, and be connected in parallel on and obtain the phase-splitting reverse voltage warning lamp 10 at phase-splitting voltage determination relay 11,12,13 two ends that exciting voltage starts action and ignite, press alarm for anti-power transmission.

Above-mentioned two kinds of situations be intelligent breaker 4 former under gate-dividing state power transmission, if intelligent breaker 4 is in "on" position when power transmission, locking-controller of the present utility model enters voltage direction qualification process, adopts the method qualification voltage direction of " examination separating brake once ".Be specially: no matter power transmission is from what side, when incoming call, in three phase-splitting voltage determination relays 11,12,13, has an excitation at least, measure relay normally open contact 17,18,19 for its three and have a closure at least, in the open delay time of adjusting, time-delay relay normally-closed contact 22 is in on-state, and intelligent breaker switching winding 42 obtains exciting voltage and separating brake, thereafter, if three phase-splitting voltage determination relays 11,12,13 have one at least still in excitation when power transmission comes from load user side, the series loop of its three mensuration relay normally-closed contacts, 14,15,16 compositions is opened, intelligent breaker closing coil 41 can not close a floodgate, and the while ignites warning with the phase-splitting reverse voltage warning lamp 10 that three phase-splitting voltage determination relays 11,12,13 are in parallel, three phase-splitting voltage determination relays 11 when if power transmission comes from distribution transformer side, 12, 13 disconnections with intelligent breaker main contacts 43 and loss of excitation, three mensuration relay normally-closed contacts 14, 15, 16 all return to closure, by the time the opening of monitoring voltage time-delay relay 21 is adjusted after delay time, its time-delay relay normally opened contact 23 closures, intelligent breaker 4 moves combined floodgate because intelligent breaker closing coil 41 regains exciting voltage, intelligent breaker main contacts 43 closures are formally to load user side power transmission, although three phase-splitting voltage determination relays 11 after formal power transmission, 12, its three of 13 excitations are measured relay normally open contact 17, 18, 19 connect, but because monitoring voltage time-delay relay 21 has exceeded the open delay time of adjusting, its time-delay relay normally-closed contact 22 is opened and is made intelligent breaker switching winding 42 exciting voltage of can not reentrying, intelligent breaker 4 will maintain "on" position operation.

When locking-controller of the present utility model coordinates with intelligent breaker 4, monitoring voltage time-delay relay 21 is for monitoring that distribution transformer side voltage is only miscellaneous function, its major function is that the time-delay relay normally-closed contact 22 of opening by short time delay is controlled intelligent breaker sub-gate circuit, can realize opening is in short-term to come from time-delay relay normally-closed contact 22 to have short time delay opening characteristic, its open delay time of adjusting must be greater than " three voltage determination relay normally open contacts 17, 18, operate time+intelligent breaker switching winding 42 opening times of one of 19 " sum leave appropriate time nargin, to ensure that the reliable examination of intelligent breaker 4 in "on" position separates, three phase-splitting voltage determination relays 11 after examination separating brake, 12, 13 carry out reverse voltage qualification, if no longer miss separating brake while being accredited as forward power transmission after intelligent breaker 4 automatic closings, or direct locking is closed a floodgate while being accredited as reverse power transmission.For example: phase-splitting voltage determination pull up time of the present utility model is 10～15ms, it is 80～100ms that intelligent breaker 4 moves opening time, the opening of monitoring voltage time-delay relay 21 delay time of adjusting is greater than (100+15) ms, add again the adequate allowance time (as 25ms), can adjust and be taken as 140ms.

Measure relay normally open contact 17,18,19 for three and can be considered as an element, equate three operate times of measuring relay normally open contact 17,18,19; In present embodiment, the technical indicator of intelligent breaker switching winding 42 is to be described by separating brake 80～100ms operate time, when practical application, will adjust according to concrete operate time cheracteristic.

It should be noted that: automatic trip deduction of points lock when the low pressure of intelligent breaker 4, under-voltage protection should normally enable to ensure to have a power failure decompression; in order to avoid locking-controller of the present utility model carries out unnecessary examination separating brake when forward power transmission; in addition; the various protections of intelligent breaker 4 (overcurrent, short circuit, decompression, under-voltage etc.) should arrange unified locking contact; make, after line fault protection action tripping operation, the automatic closing of intelligent breaker 4 is implemented to locking, so as not to after protection action intelligent breaker 4 separating brakes this lock control its make by force its combined floodgate.When this locking-controller principle logic function is done to the built-in design of intelligent breaker; lock control logic function and defencive function integrated configuration; the intelligent protection of intelligent breaker 4 and the lock control logic of this locking-controller are organically blended; concrete realize pattern and can be realized by multiple patterns such as relay, integrated circuit, microprocessors, the essence of its lock-in control logic is constant.

Divide the mode of intelligent breaker 4 to identify phase-splitting voltage determination relay 11 by examination, 12, the supplier of electricity of 13 voltages of measuring to reason be: intelligent breaker 4 when the "on" position power transmission distribution transformer side and load user side voltage circuit because of intelligent breaker main contacts 43 simultaneously charged at closure state, can not identify which direction voltage comes from, examination separating brake once after, intelligent breaker main contacts 43 disconnects, just identify voltage from direction, the formal power transmission of automatic closing in the time that voltage comes from distribution transformer side, if voltage closes a floodgate locking while coming from load user side again, the monitoring voltage lamp 20 of monitoring voltage time-delay relay 21 two ends parallel connections, reflect having or not of place loop voltage.

When locking-controller of the present utility model coordinates with intelligent breaker 4; for intelligent breaker 4; its protection action tripping operation should be able to be closed a floodgate in locking, removes the manipulation locking of closing a floodgate determining after having fixed a breakdown, so that locking-controller of the present utility model is coordinated with intelligent breaker 4.

As shown in Figure 5, Figure 6, locking-controller of the present utility model is except being directly used in locking distribution transformer low-voltage distributing line, also can be used in high-tension distributing line, when for high-tension distributing line, the operating voltage of its three phase-splitting voltage determination relays 11,12,13 is provided by load side high voltage potential transformer, and the operating voltage of monitoring voltage time-delay relay 21 is provided by mains side high voltage potential transformer.

Claims

1. the automatic locking-controller of back-pressure, realizes the anti-voltage security control that send of low pressure for coordinating with low tension switch, it is characterized in that, comprises the open blocking mechanism of reverse voltage blocking mechanism (1) and time delay (2):

Described reverse voltage blocking mechanism (1) comprising:

Three phase-splitting voltage determination relays (11,12,13) that common port is parallel with one another, its common terminal be connected to zero mutually in, another terminals are connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after the control of three low tension switch main contactss, measure reverse voltage for low tension switch three phase-splitting voltage determination relays (11,12,13) under gate-dividing state;

Be connected in parallel on respectively three phase-splitting reverse voltage warning lamps (10) at three phase-splitting voltage determination relays (11,12,13) two ends, for the voltage of measuring is warned with light form;

After series connection, be connected to successively three mensuration relay normally-closed contacts (14,15,16) in low tension switch closing coil loop, be used to form combined floodgate lock control output signal low tension switch is implemented to close a floodgate and lock-in control;

Measure relay normally open contact (17,18,19) for three that after parallel with one another, are connected to low tension switch switching winding loop, be used to form separating brake lock control output signal low tension switch is implemented to separating brake and lock-in control;

The open blocking mechanism of described time delay (2) comprising:

Two terminals are directly connected to respectively the monitoring voltage time-delay relay (21) in the one phase voltage loop neutralization zero mutually of distribution transformer side, for monitoring forward voltage and open locking in short-term;

The monitoring voltage lamp (20) that is connected in parallel on monitoring voltage time-delay relay (21) two ends, described monitoring voltage lamp (20) is followed monitoring voltage time-delay relay (21) excitation and is ignited;

With three mensuration relay normally-closed contacts (14,15,16) acting in conjunction, low tension switch closing coil loop is implemented the time-delay relay normally opened contact (23) of closing locking control, for forward power transmission automatic closing;

With the time-delay relay normally-closed contact (22) of three mensuration relay normally open contacts (17,18,19) acting in conjunction to low tension switch switching winding loop enforcement separating brake lock-in control, for former low tension switch in "on" position examination separating brake in the time of power transmission once, so as three phase-splitting voltage determination relays (11,12,13) qualification voltage distribution side to.

2. the automatic locking-controller of back-pressure according to claim 1, it is characterized in that, the opening of described time-delay relay normally-closed contact (22) delay time of adjusting meets: during by load user's side reverse power transmission, after the former low tension switch automatic brake separating in "on" position, reliable locking is not closed a floodgate; During by distribution transformer forward power transmission, the former low tension switch in "on" position automatically tries separating brake and is once accredited as after forward power transmission the formal reliable power transmission of automatic closing again;

Described time-delay relay normally opened contact (23) and the opening of time-delay relay normally-closed contact (22) delay time of adjusting is identical, that is: described time-delay relay normally opened contact (23) moves with time-delay relay normally-closed contact (22) simultaneously.

3. the automatic locking-controller of back-pressure according to claim 1, it is characterized in that, described three phase-splitting voltage determination relays (11,12,13), monitoring voltage time-delay relay (21), separating brake relation operate time of low tension switch meets work-based logic needs: monitoring voltage time-delay relay (21) is greater than phase-splitting voltage determination relay actuation time+low tension switch opening time sum operate time, and leaving time margin, described monitoring voltage time-delay relay (21) can be adjusted operate time according to actual needs.

4. the automatic locking-controller of back-pressure according to claim 1, it is characterized in that, in the time that low tension switch is A.C. contactor (3), the terminals of described three phase-splitting voltage determination relays (11,12,13) are connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after three A.C. contactor main contactss (32) are controlled, be used for measuring reverse voltage, the common terminal of three phase-splitting voltage determination relays (11,12,13) be connected to zero mutually in, two terminals of monitoring voltage time-delay relay (21) are directly connected to respectively in the one phase voltage loop neutralization zero mutually of distribution transformer side, obtain the electric rear monitoring voltage lamp (20) in parallel with monitoring voltage time-delay relay (21) and ignite, for monitoring forward voltage, A.C. contactor closing coil (31) one end is directly connected in distribution transformer side one phase voltage loop, the other end is through three mensuration relay normally-closed contacts (14, 15, 16) and time-delay relay normally opened contact (23) control after be connected to zero mutually in, three mensuration relay normally-closed contacts (14, 15, 16) and between time-delay relay normally opened contact (23) for being connected in series, three mensuration relay normally-closed contacts (14, 15, 16) series connection successively, no matter to ensure user anti-power transmission device and in which locking-controller mutually of the present invention can work, three mensuration relay normally-closed contacts (14, 15, 16) loop and after time-delay relay normally opened contact (23) series connection and A.C. contactor are often opened auxiliary contact (33) and are in parallel, A.C. contactor often leaves auxiliary contact (33) for the self-sustaining of closing a floodgate, time-delay relay normally opened contact (23) closure after delay time is adjusted in the opening of monitoring voltage time-delay relay (21), three mensuration relay normally-closed contacts (14, 15, 16) and time-delay relay normally opened contact (23) and A.C. contactor often open acting in conjunction between auxiliary contact (33) A.C. contactor closing coil (31) feed motion exciting voltage and self-contained supply be provided, three A.C. contactor main contactss (32) two ends are connected to respectively in the load user side voltage circuit of distribution transformer side and low-voltage distributing line, and after A.C. contactor closing coil (31) excitation, its three A.C. contactor main contactss (32) closure will provide three phase mains for user.

5. the automatic locking-controller of back-pressure according to claim 4, it is characterized in that, this locking-controller coordinates with A.C. contactor (3) to be realized the anti-voltage security control that send of low pressure, when by distribution transformer side forward power transmission: under this situation, in the time of incoming call, three phase-splitting voltage determination relays (11 of reverse voltage blocking mechanism (1), 12, 13) all do not obtained exciting voltage, three mensuration relay normally-closed contacts (14, 15, 16) in closed on-position, after delay time is adjusted in opening in short-term, time-delay relay normally opened contact (23) is closed connects, A.C. contactor closing coil (31) obtains exciting voltage and carries out feed motion, three A.C. contactor main contactss (32) are closed connection to load user side forward power transmission all, A.C. contactor often leaves closed connection the in auxiliary contact (33) and forms self-sustaining, A.C. contactor (3) is able to move in "on" position, three A.C. contactor main contactss (32) are connected rear three phase-splitting voltage determination relays (11, 12, 13) must be electric in excited state, be connected in parallel on three voltage determination relays (11, 12, 13) the phase-splitting reverse voltage warning lamp (10) at two ends keeps igniting, now warning lamp uses as load operation repeater lamp,

When by the reverse power transmission of load user's side: under this situation, in the load user side phase of low-voltage distributing line or each phase voltage loop, having anti-power transmission presses, three phase-splitting voltage determination relays (11, 12, 13) in, have at least an acquisition exciting voltage to start action, three mensuration relay normally-closed contacts (14, 15, 16) in, have at least one will disconnect, A.C. contactor closing coil (31) can not obtain exciting voltage, and be connected in parallel on the phase-splitting voltage determination relay (11 that acquisition exciting voltage starts action, 12, 13) the phase-splitting reverse voltage warning lamp (10) at two ends ignites, press alarm for anti-power transmission.

6. the automatic locking-controller of back-pressure according to claim 4, it is characterized in that, this locking-controller coordinates with A.C. contactor (3) to be realized the anti-voltage security control that send of low pressure, described monitoring voltage time-delay relay (21) is mainly used in the monitoring voltage of distribution transformer side, the element of reflecting voltage state is monitoring voltage lamp (20), also can participate in A.C. contactor closing coil (31) closing locking, or do not participate in the closing locking of A.C. contactor closing coil (31), if do not participate in, time-delay relay normally opened contact (23) does not access use, the no matter whether closing circuit of incoming transport contactor closing coil (31) of time-delay relay normally opened contact (23), the opening of monitoring voltage time-delay relay (21) delay time of adjusting does not need to do fiting tuning, can adjust arbitrarily.

7. the automatic locking-controller of back-pressure according to claim 1, it is characterized in that, in the time that low tension switch is intelligent breaker (4), the terminals of three phase-splitting voltage determination relays (11,12,13) are connected to respectively in the each phase voltage of the load user side loop of the low-voltage distributing line after three intelligent breaker main contactss (43) are controlled, be used for measuring the reverse voltage under intelligent breaker main contacts (43) off-state, the common terminal of three phase-splitting voltage determination relays (11,12,13) be connected to zero mutually in, time-delay relay normally-closed contact (22) is measured relay normally open contacts (17 with three parallel with one another, 18, 19) often opening auxiliary contact (44) with intelligent breaker again after being connected in series connects, the controlled end of access intelligent breaker switching winding (42), intelligent breaker switching winding (42) controlled end is often opened auxiliary contact (44) through intelligent breaker, measure relay normally open contact (17 for parallel with one another three, 18, 19) and after time-delay relay normally-closed contact (22) control access intelligent breaker working power loop, time-delay relay normally-closed contact (22) is measured relay normally open contacts (17 with three parallel with one another, 18, 19) and intelligent breaker often open between auxiliary contact (44) as being connected in series, time-delay relay normally-closed contact (22) is open in short-term for locking-controller blocking function of the present invention, opening into intelligent breaker (4) execution once tries to proceed to forward combined floodgate or reverse blocking state after separating brake, two terminals of monitoring voltage time-delay relay (21) are directly connected to respectively in the one phase voltage loop neutralization zero mutually of distribution transformer side, obtain the electric rear monitoring voltage lamp (20) in parallel with monitoring voltage time-delay relay (21) and ignite, for monitoring forward voltage, three mensuration relay normally-closed contacts (14 of series connection successively, 15, 16) be connected in series with the normally closed auxiliary contact of intelligent breaker (45) again after connecting with time-delay relay normally opened contact (23), the controlled end of access intelligent breaker closing coil (41), be that intelligent breaker closing coil (41) controlled end is through the normally closed auxiliary contact of intelligent breaker (45), three mensuration relay normally-closed contacts (14 of series connection successively, 15, 16) and after time-delay relay normally opened contact (23) control access intelligent breaker working power loop, the normally closed auxiliary contact of intelligent breaker (45), three mensuration relay normally-closed contacts (14, 15, 16) and between time-delay relay normally opened contact (23) for being connected in series, the combined floodgate of time-delay relay normally opened contact (23) intelligent breaker (4) during for forward power transmission starts, that is: former intelligent breaker (4) the automatic closing power transmission in gate-dividing state when voltage comes from distribution transformer side, or former intelligent breaker (4) in "on" position examination separating brake once after formal combined floodgate power transmission, ensure user anti-power transmission device no matter and in which locking-controller mutually of the present invention can work, the normally closed auxiliary contact of intelligent breaker (45) is for determining whether intelligent breaker (4) is gate-dividing state, three intelligent breaker main contactss (43) two ends are connected to respectively in the load user side voltage circuit of distribution transformer side and low-voltage distributing line, intelligent breaker closing coil (41) excitation rear three intelligent breaker main contactss (43) closure of closing a floodgate will provide three phase mains for user, when voltage comes from low-voltage customer load side the former intelligent breaker (4) in gate-dividing state directly locking close a floodgate, or former intelligent breaker (4) in "on" position proceeds to closing locking state after examination separating brake.

8. the automatic locking-controller of back-pressure according to claim 7, it is characterized in that, this locking-controller coordinates with intelligent breaker (4) to be realized the anti-voltage security control that send of low pressure, when by distribution transformer side forward power transmission: under this situation, in the time of incoming call, three phase-splitting voltage determination relays (11 of reverse voltage blocking mechanism (1), 12, 13) all do not obtained exciting voltage, three mensuration relay normally-closed contacts (14, 15, 16) all in closed on-position, after the open delay time of adjusting, time-delay relay normally opened contact (23) is closed connects, intelligent breaker closing coil (41) obtains exciting voltage and carries out feed motion, three intelligent breaker main contactss (43) are closed connection to load user side forward power transmission all, intelligent breaker (4) remains on "on" position operation, if intelligent breaker when power transmission (4) is former in "on" position, while incoming call, measure relay normally open contacts (17 for three parallel with one another, 18, 19) all by closure, and in the open delay time of adjusting time-delay relay normally-closed contact (22) temporarily in closed on-position, intelligent breaker switching winding (42) obtains exciting voltage and carries out separating brake, after separating brake because of three mensuration relay normally-closed contacts (14, 15, 16) all will return to closure, after the open delay time of adjusting, time-delay relay normally opened contact (23) is closed connects, intelligent breaker closing coil (41) obtains exciting voltage and carries out formal combined floodgate power transmission, thereafter, because the time exceedes the setting value of opening the delay time of adjusting already, although three are measured relay normally open contact (17, 18, 19) by closure, but because time-delay relay normally-closed contact (22) is opened, intelligent breaker switching winding (42) can not obtain exciting voltage, intelligent breaker (4) moves in "on" position,

When by the reverse power transmission of load user's side: under this situation, in the time of incoming call, three phase-splitting voltage determination relays (11,12,13) of reverse voltage blocking mechanism (1) have at least one to obtain exciting voltage, three mensuration relay normally-closed contacts (14,15,16) of series connection have at least one to open successively, and intelligent breaker closing coil (41) can not obtain exciting voltage and in blocking, if intelligent breaker when power transmission (4) is former in "on" position, while incoming call, measure relay normally open contacts (17 for three parallel with one another, 18, 19) has a closure at least, in the open delay time of adjusting, time-delay relay normally-closed contact (22) is in temporary transient closure state, intelligent breaker switching winding (42) obtains exciting voltage and carries out separating brake action, after separating brake, press and still exist because of anti-power transmission, three mensuration relay normally-closed contacts (14, 15, 16) has one at least in open mode, intelligent breaker closing coil (41) can not obtain exciting voltage and just enter closing locking state, and be attended by phase-splitting reverse voltage warning lamp (10) and ignite and warned.

9. the automatic locking-controller of back-pressure according to claim 7, it is characterized in that, when this locking-controller coordinates with intelligent breaker (4), described monitoring voltage time-delay relay (21) is for monitoring that distribution transformer side voltage is only miscellaneous function, its major function is that the time-delay relay normally-closed contact (22) opened by short time delay makes the former intelligent breaker (4) in "on" position implement once to try separating brake, with identify voltage distribution side to; It implements the locking effect of reverse power transmission, can realize opening is in short-term to come from time-delay relay normally-closed contact (22) to have short time delay opening characteristic, and the size of its short time delay opening time need be carried out logic with intelligent breaker (4) operate time, phase-splitting voltage determination and coordinate relay actuation time; Monitoring voltage time-delay relay (21), meet work-based logic needs the operate time of three phase-splitting voltage determination relays (11,12,13) and intelligent breaker (4), the opening of monitoring voltage time-delay relay (21) delay time of adjusting is greater than operate time+intelligent breaker switching winding (42) opening time sum of measuring relay normally open contact one of (17,18,19), and leaves time margin.

10. the automatic locking-controller of back-pressure according to claim 1, is characterized in that, this locking-controller can be realized by relay, integrated circuit or microprocessor chip form; In the time being realized by relay form, can be discrete relay group or banked relay; In the time being realized by integrated circuit or microprocessor chip form, should protect control loop to do built-in design at intelligent breaker; No matter which kind of pattern, reverse voltage locking and the open philosophy function logic of this locking-controller are constant.